提出了一种基于三角晶格二维光子晶体解波分复用器。该器件主体由线缺陷波导、环形谐振腔及点缺陷微腔构成。使用平面波展开法研究了线缺陷波导的特性,给出了线缺陷波导的能带图,对局部器件微调后进行大量的性能仿真以及对整体器件进行性能仿真,选择合适的器件参数,并使用时域有限差分法研究了不同波长的光在解波分复用器中的传输特性,并给出了电场分布图。仿真结果表明,该种结构可以实现波长分别为1271nm和1291nm两种光波的解波分复用。采用6个额外的介质柱,提高了环形腔的透射率;并通过在入射波导的入射口处增加三对介质柱,提高了波导的出射效率,从而整体上提高了双通道解波分复用器的输出效率。 A triangular lattice two-dimensional photonic crystal wavelength division multiplexer is proposed. The main body of the device consists of a line defect waveguide, a ring resonator and a point defect microcavity. The characteristic of linear defect waveguide is studied by using the plane wave expansion method. The band diagram of the linear defect waveguide is given. After the local device is fine tuned, a large number of performance simulations are carried out and the overall performance of the device is simulated. The appropriate device parameters are selected and used The field finite difference method is used to study the transmission characteristics of different wavelengths of light in a wavelength division multiplexer and the electric field distribution is given. The simulation results show that this kind of structure can realize the wavelength division multiplexing of the two light waves with wavelength of 1271nm and 1291nm respectively. The use of six extra columns of media improves the transmission of the annular cavity. By adding three pairs of dielectric columns at the entrance of the incident waveguide, the waveguide output efficiency is improved, thereby improving the overall performance of the dual-channel demultiplexer Output efficiency of the device.